Index
horizon elevation
Specify the horizon that is to be assumed by the show command.
- Arguments:
-
Elevation elevation
- The elevation angle of the desired horizon.
- Example:
- The following example tells subsequent invokations of the
show command to compute the rise and set
times of sources, for an elevation of 43 degrees.
horizon 43.0
- Context:
- In addition to showing where a source is positioned, the
show command displays the times at which
the source next rises and sets. Until the horizon command has
first been run, the rise and set times are computed assuming a
local elevation of 0.0 degrees. The CBI has a minimum elevation
of 42 degrees, so this gives a false impression of when the
source will be visible. The horizon command is thus normally
called from the $CBI_DIR/conf/cbicontrol.init script to specify
an elevation that matches the mimimum elevation of the
telescope.
Martin Shepherd (31-Jan-1999)